Cita APA (7th ed.)

PERRY MAJOR G. (2002). RULES AND TOOLS FOR LEADERS. APERIGEE.

Cita Chicago (17th ed.)

PERRY MAJOR G. RULES AND TOOLS FOR LEADERS. U.S.A: APERIGEE, 2002.

Cita MLA (9th ed.)

PERRY MAJOR G. RULES AND TOOLS FOR LEADERS. APERIGEE, 2002.